** (Phoenix.Router.NoRouteError) no route found for GET /fake (MyApp.Router)-CodePudding

Recently, I’ve been working on updating a legacy repo. I’ve had to update Erlang, Elixir, Phoenix and a lot of dependencies. The repo is most likely going to be deprecated in the near future so I’ve tried to avoid doing too much refactoring, even though that's probably necessary. I currently have 1 test that is failing and I cannot figure out how to fix this.

The test checks to see if my 404.html template is rendered when hitting a route the doesn’t exist.

The test:

  test "renders 404.html" do
    conn = get build_conn(), "/fake"
    assert html_response(conn, 404) ==
      "<!DOCTYPE html>\n<html lang=\"en\">\n  <head>\n    <meta charset=\"utf-8\">\n    <meta http-equiv=\"X-UA-Compatible\" content=\"IE=edge\">\n    <meta name=\"viewport\" content=\"width=device-width, initial-scale=1\">\n    <meta name=\"description\" content=\"\">\n    <meta name=\"author\" content=\"\">\n    <link rel=\"stylesheet\" href=\"http://localhost/css/index.css\">\n    <title>404 - Page Not Found</title>\n  </head>\n\n  <body class=\"error-body\">\n    <div class=\"error-div\">\n      <img class=\"error-img\" src=\"/images/error_dolphin.gif\">\n      <h1>Error 404!</h1>\n      <p class=\"error-p\">Hmmm... the page you're looking for is missing.</p>\n      <button class=\"error-button\">\n        <a class=\"error-a\" href=\"/dashboard\">Go to Homepage</a>\n      </button>\n    </div>\n  </body>\n</html>\n"
  end

When I spin the server up and hit a non-existent endpoint through Postman, I get the response I expect. When I run the test in my terminal, I get this:

1) test renders 404.html (MyApp.ErrorViewTest)
test/views/error_view_test.exs:4
** (Phoenix.Router.NoRouteError) no route found for GET /fake (MyApp.Router)
code: conn = get build_conn(), "/fake"
stacktrace:
  (MyApp 0.0.1) lib/phoenix/router.ex:402: MyApp.Router.call/2
  (MyApp 0.0.1) lib/MyApp/endpoint.ex:1: MyApp.Endpoint.plug_builder_call/2
  (MyApp 0.0.1) lib/MyApp/endpoint.ex:1: MyApp.Endpoint.call/2
  (phoenix 1.5.13) lib/phoenix/test/conn_test.ex:225: Phoenix.ConnTest.dispatch/5
  test/views/error_view_test.exs:5: (test)


Finished in 0.06 seconds (0.06s async, 0.00s sync)
1 test, 1 failure

Here is my ErrorView:

defmodule MyApp.ErrorView do
  use MyApp.Web, :view

  def render("500.json", _assigns) do
    %{error: "Error"}
  end

  def render("404.json", _assigns) do
    %{error: "Not Found"}
  end

  def render("401.json", _assigns) do
    %{error: "Unauthenticated"}
  end

  def render("403.json", _assigns) do
    %{error: "Unauthorized"}
  end

  def render("400.json", %{error: error}) do
    %{error: error}
  end

  # In case no render clause matches or no
  # template is found, let's render it as 500
  def template_not_found(_template, assigns) do
    render "500.html", assigns
  end
end

I’m currently using Phoenix 1.5.5, Elixir 1.13.1, Erlang 24.1.7

Any help would be greatly appreciated here.

CodePudding user response：

Wrap the get in your test with assert_error_sent/2 and you should be good to go :)